metalogalva electrical components Germany metalogalva model metalogalva price

metalogalva electrical components are instruments that measure by converting high primary current to low secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured. Therefore, the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instrument and protection circuit is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured, so the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instrument and protection circuit is very small, and the operating state of the current transformer is close to a short circuit.

metalogalva electrical component composition

1. Generally, a fuse consists of three parts: first, the fuse element part, which is the core of the fuse and serves to cut off the current when it melts. For fuses of the same type and specification, the fuse elements must have the same material, the same geometric dimensions, as small and consistent resistance values as possible, and most importantly, consistent fusing characteristics. Household fuses are commonly made of lead-antimony alloy; second, the electrode part, usually two, which is an important component connecting the fuse element to the circuit. It must have good conductivity and should not produce significant installation contact resistance; third, the holder part. The fuse element is generally thin and soft, and the role of the holder is to fix the fuse element and make the three parts a rigid whole for easy installation and use. It must have good mechanical strength, insulation, heat resistance, and flame retardancy, and should not exhibit phenomena such as breaking, deformation, combustion, or short circuits during use. 2. Arc extinguishing device: Fuses used in power circuits and high-power equipment not only have the three parts of general fuses but also include an arc extinguishing device. This is because the circuits protected by such fuses not only have larger operating currents, but also have very high voltages across the terminals when the fuse element melts. Often, the fuse element has melted (fused) or even vaporized, but the current has not been cut off. The reason is that at the moment of fusing, arcing occurs between the two electrodes of the fuse under the action of voltage and current. This arc extinguishing device must have strong insulation and good thermal conductivity, and be negatively charged. Quartz sand is a commonly used arc extinguishing material. 14. Fusing indication device: Some fuses have a fusing indication device. Its function is to cause a certain change in appearance after the fuse operates (melts), making it easy for maintenance personnel to detect, such as emitting light, changing color, or popping out a solid indicator.

metalogalva electrical component principle

An AC power supply that can provide a stable voltage and frequency is called an AC stabilized power supply. Most domestic manufacturers focus on AC voltage stabilization. Below is a brief description of the classification characteristics of AC stabilized power supplies available on the market. Parameter adjustment (resonance) type: The basic principle of voltage stabilization for this type of stabilized power supply is LC series resonance. Early magnetic saturation stabilizers belong to this category. Its advantages are: simple structure, no numerous components, relatively high reliability, relatively wide voltage stabilization range, and strong anti-interference and overload capacity. The disadvantages are: high energy consumption, high noise, heavy weight, and high cost.

metalogalva electrical component characteristics

The characteristics of an inductor are exactly opposite to those of a capacitor. It has the characteristic of blocking alternating current while allowing direct current to pass smoothly. The resistance when a DC signal passes through the coil is just the resistance of the wire itself, resulting in a very small voltage drop; when an AC signal passes through the coil, a self-induced electromotive force is generated at both ends of the coil. The direction of the self-induced electromotive force is opposite to that of the applied voltage, hindering the passage of AC. Therefore, the characteristic of an inductor is to pass DC and block AC. The higher the frequency, the greater the coil impedance. Inductors often work together with capacitors in circuits to form LC filters, LC oscillators, etc. In addition, people utilize the characteristics of inductance to manufacture chokes, transformers, relays, etc. Passing DC: refers to the inductor presenting a conductive state to DC. If the resistance of the inductor coil is ignored, then DC can pass through the inductor "unimpeded." For DC, the coil's own resistance has very little hindering effect, so it is often ignored in circuit analysis. Blocking AC: When AC passes through the inductor coil, the inductor presents a hindering effect to the AC. What hinders the AC is the inductive reactance of the inductor coil.

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